Yoga Sutra 3.39 mastering the upgoing vital current udana
Sūtra III.39 By mastering the upgoing vital current (udāna), he passes untouched over water, mud, thorns and so on, and at death he takes the upward course Life is the operation of the totality of the senses, as prāṇa, etc. Its activity is five-fold. Prāṇa has its operation passing through the nostrils of the face…